diff --git a/packages/block-editor/src/content.scss b/packages/block-editor/src/content.scss
index b4a586fc4e077..fa78f2d41f9f9 100644
--- a/packages/block-editor/src/content.scss
+++ b/packages/block-editor/src/content.scss
@@ -12,3 +12,7 @@
 @import "./components/plain-text/content.scss";
 @import "./components/rich-text/content.scss";
 @import "./components/warning/content.scss";
+
+// To do: ideally the iframe does not contain UI, but there's still the block
+// placeholders that will be moved to shadow DOM in the future.
+@include wordpress-admin-schemes();